a0f269f682
This is the first of a sequence of changes to support compiling Cycles kernels as MSL (Metal Shading Language) in preparation for a Metal GPU device implementation. MSL requires that all pointer types be declared with explicit address space attributes (device, thread, etc...). There is already precedent for this with Cycles' address space macros (ccl_global, ccl_private, etc...), therefore the first step of MSL-enablement is to apply these consistently. Line-for-line this represents the largest change required to enable MSL. Applying this change first will simplify future patches as well as offering the emergent benefit of enhanced descriptiveness. The vast majority of deltas in this patch fall into one of two cases: - Ensuring ccl_private is specified for thread-local pointer types - Ensuring ccl_global is specified for device-wide pointer types Additionally, the ccl_addr_space qualifier can be removed. Prior to Cycles X, ccl_addr_space was used as a context-dependent address space qualifier, but now it is either redundant (e.g. in struct typedefs), or can be replaced by ccl_global in the case of pointer types. Associated function variants (e.g. lcg_step_float_addrspace) are also redundant. In cases where address space qualifiers are chained with "const", this patch places the address space qualifier first. The rationale for this is that the choice of address space is likely to have the greater impact on runtime performance and overall architecture. The final part of this patch is the addition of a metal/compat.h header. This is partially complete and will be extended in future patches, paving the way for the full Metal implementation. Ref T92212 Reviewed By: brecht Maniphest Tasks: T92212 Differential Revision: https://developer.blender.org/D12864
89 lines
3.0 KiB
C
89 lines
3.0 KiB
C
/*
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* Adapted from Open Shading Language with this license:
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*
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* Copyright (c) 2009-2010 Sony Pictures Imageworks Inc., et al.
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* All Rights Reserved.
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*
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* Modifications Copyright 2011, Blender Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of Sony Pictures Imageworks nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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CCL_NAMESPACE_BEGIN
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/* BACKGROUND CLOSURE */
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ccl_device void background_setup(ccl_private ShaderData *sd, const float3 weight)
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{
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if (sd->flag & SD_EMISSION) {
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sd->closure_emission_background += weight;
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}
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else {
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sd->flag |= SD_EMISSION;
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sd->closure_emission_background = weight;
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}
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}
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/* EMISSION CLOSURE */
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ccl_device void emission_setup(ccl_private ShaderData *sd, const float3 weight)
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{
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if (sd->flag & SD_EMISSION) {
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sd->closure_emission_background += weight;
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}
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else {
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sd->flag |= SD_EMISSION;
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sd->closure_emission_background = weight;
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}
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}
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/* return the probability distribution function in the direction I,
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* given the parameters and the light's surface normal. This MUST match
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* the PDF computed by sample(). */
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ccl_device float emissive_pdf(const float3 Ng, const float3 I)
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{
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float cosNO = fabsf(dot(Ng, I));
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return (cosNO > 0.0f) ? 1.0f : 0.0f;
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}
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ccl_device void emissive_sample(const float3 Ng,
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float randu,
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float randv,
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ccl_private float3 *omega_out,
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ccl_private float *pdf)
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{
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/* todo: not implemented and used yet */
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}
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ccl_device float3 emissive_simple_eval(const float3 Ng, const float3 I)
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{
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float res = emissive_pdf(Ng, I);
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return make_float3(res, res, res);
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}
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CCL_NAMESPACE_END
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